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A Catalogue of Recent Cephalopoda. 255 



period. It is a work of remarkable erudition and critical 

 ability. On account of its brevity (it occupies only some 

 oO pages) it is of necessity very dogmatic in tone, and the 

 reader misses the evidence on which the various judgments 

 are based. It is a striking instance of the subdivision of 

 genera referred to above, for of the 50 generic groups 

 recognised, no less than 43 are monotypic. 



The interesting results of the expeditions of the Prince of 

 Monaco have been given to the world by Professor .Joubin, 

 in two splendid Memoirs, got up and illustrated in truly 

 princely style, and a number of smaller papers. In this con- 

 nection must be mentioned the discoverv, that a verv large 

 number of Cephalopoda possess luminous organs of varied and 

 often complex structure ; for which science is largely indebted 

 to the labours of Professor Joubin and Professor Chun. 



A very important event of the last few years has been 

 the rise of what may be called the " Leipzig school " of 

 teuthologists. The cruise of the "Yaldivia" furnished 

 Professor Chun with examples of many of the rarest species 

 of Cephalopods, as well as with a large number of new and 

 remarkable forms, and it is therefore not wonderful that he 

 and his students, amoncr -^hom we mav mention the names 

 of Meyer and Marchand, should have been inspired to enter 

 upon the study of these interesting animals. Several 

 important papers have already proceeded from their pens, 

 and the publication of the report on the " Yaldivia '"' collec- 

 tion will mark an epoch in this branch of science. 



In preparing this Supplement, I have not confined myself 

 to the enumeration of new species, but have recorded the 

 instances in which a species has been removed from one genus 

 to another. For the sake of convenience, too, a few species 

 described since the close of the year 1906 have been included, 

 but the list does not pretend to completeness after that date. 



The Bibliography, taken in conjunction with the references 

 given in the earlier parts of the Catalogue, will, it is thought, 

 be found to include all important writings dealing with the 

 systematic aspect of the subject. The figures given in the 

 text refer to the year of publication, the centuries being 

 indicated as follows : — 17 - -i, 18--', 19--: 



